Thousands of Swallows at Seaford

Dick Jackson, per SOS sightings:

The birds were coming in off Seaford Bay and feeding on the hatch of flies along the cliff top. The bay was a mass of Swallows moving east. I could not accurately estimate a true number but it must have been thousands. Above Spash Point we were engulfed in the mass of Swallows, a truly marvellous experience. At 13.45 it was all over apart from a few stragglers. A remarkable event the like of which I cannot recall.